This reads like a corporate phishing email. Probably came from jeff.bezos@therealamazon.com

If it was a phishing email it would have a signal username, not just "use signal"

AFAIK Signal usernames didn't exist in 2020.

Is this a law or something?

Well, considering an outbreak of destroyed evidence seems to be happening in the courts, with some accountability hopefully it will be an unwritten law. But of course Congress could also get involved.

Should we outlaw executives having business-related phone calls or face-to-face conversations, too?

> Should we outlaw executives having business-related phone calls or face-to-face conversations, too?

Or outlaw writing their memos on flashpaper?

Really, their written communications need to be discoverable. And it wouldn't be unreasonable to require at least notes be taken of their phone calls and meetings.

And if those calls weren't recorded, is that going to be destruction of evidence too? Where is the line drawn and who gets to say where?

to me this is like saying a casual conversation in the park is destruction of evidence just because you didn't record it

Nope, just their opinion